[Yaesu] FT-100D heating problem when the remote head is removed.

[Martin Arsenault]

Hello,

This afternoon, I come in my car and I mount my FT-100D removable head
on his  mounting socket.  I put the power ON and I realized that the fan
on the FT-100d unit, in the back of the car, are running very fast at
the moment that I open the radio. I was thinking that the sun make the
radio case very hot to force these fans to start even before I start
transmitting.

So, i do not care to this at that moment.  I take the microphone and
start my transmission on a local 2m repeater.  I realized that my signal
is very border line on the repeater...in normal time a little handheld
radio with 500mW can make a good contact on the repeater.  So, I was
considering a problem with my radio.  I look at the meter and the SWR
seems to be good (1:1) but the power was 0! No output at all.  I am
looking in the menus to see if my power was wrong, but it was at 50W.
so, why I got  that problem and I am not transmitting the 50W like in
normal time.

I stop in a parking lot to look at the radio because the fans was still
running at maximum speed.  Between I have put the switch ON and the Time
I look at the radio, only 5 minutes passed.  When I touch the radio, I
realized the temperature is very very hot like if I was transmitting
since 1 hours, key down at 100W. So, I also realized that heating
happened when the radio was off with the remote head removed!  I have
disconnected all the power cable and let the radio cooling.

Tomorrow, when the radio will be cold, I will reconnect the power cable
and take a current measurement to see what is wrong with the
alimentation!  I will also try to transmit to see if I can exit some
power of this radio. 

Someone already get this problem?? And can help me ?

Thanks,

Martin VE2BQA